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350 lines
8.5 KiB
350 lines
8.5 KiB
/*++
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Copyright (c) 1995-1999 Microsoft Corporation. All rights reserved.
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Module Name:
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nativcom.h
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Abstract:
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Public header for COM-marshaling facilities provided by msjava.dll.
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--*/
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#ifndef _NATIVCOM_
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#define _NATIVCOM_
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#include <windows.h>
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#include <native.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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//----------------------------------------------------------------------------
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// COM and J/Direct data wrapper helpers...
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//----------------------------------------------------------------------------
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// Replaces the data pointer contained in the data wrapper with a new blob of
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// non-GC'ed heap memory. The previous blob, if any, will be freed if its
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// owned by the VM.
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JAVAVMAPI
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void*
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__cdecl
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jcdwNewData(
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HObject * phJCDW,
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unsigned int numBytes
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);
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// Returns the data pointer to the non GC'ed heap memory contained by the data
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// wrapper object.
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JAVAVMAPI
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void*
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__cdecl
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jcdwGetData(
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HObject *phJCDW
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);
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// Replaces the data pointer that this data wrapper represents with the
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// specified
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JAVAVMAPI
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int
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__cdecl
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jcdwSetData(
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HObject *phJCDW,
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LPVOID pv
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);
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// Returns TRUE if the VM allocated the non GC'ed heap memory contained by the
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// data wrapper.
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JAVAVMAPI
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int
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__cdecl
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jcdw_memory_freed_on_gc(
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HObject *phJCDW
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);
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// Returns TRUE if the VM frees the non GC'ed heap memory that this data
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// wrapper contains when the data wrapper is garbage collected.
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JAVAVMAPI
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int
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__cdecl
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jcdw_java_owned(
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HObject *phJCDW
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);
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// Returns the size of the non GC'ed heap memory contained by the data wrapper
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// object.
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JAVAVMAPI
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unsigned int
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__cdecl
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jcdwSizeOf(
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HObject *phJCDW
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);
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// Returns the size of the non GC'ed heap memory used by instances of the
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// supplied java/lang/Class object.
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JAVAVMAPI
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unsigned int
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__cdecl
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jcdwClassSizeOf(
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HObject *phJavaClass
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);
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// Returns the byte offset within the non GC'ed heap memory to the specified
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// field name.
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JAVAVMAPI
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unsigned int
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__cdecl
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jcdwOffsetOf(
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HObject *phJCDW,
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PCUTF8 putfFieldName
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);
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// Returns the byte offset within the non GC'ed heap memory to the specified
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// field name from the supplied java/lang/Class object.
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JAVAVMAPI
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unsigned int
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__cdecl
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jcdwClassOffsetOf(
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HObject *phJCDWClass,
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PCUTF8 putfFieldName
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);
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// Given an object, propagates field values from the Java object to the object's
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// associated native memory.
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// Returns FALSE on error, else TRUE.
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JAVAVMAPI
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int
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__cdecl
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jcdwPropagateToNative(
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HObject *phJCDW
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);
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// Given an object, propagates field values from the object's associated native
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// memory to the Java object. If fFreeIndirectNativeMemory is TRUE, the native
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// memory used for any reference fields (Strings, custom marshaled fields, ...)
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// will be released.
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// Returns FALSE on error, else TRUE.
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JAVAVMAPI
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int
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__cdecl
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jcdwPropagateToJava(
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HObject *phJCDW,
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BOOL fFreeIndirectNativeMemory
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);
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// Returns a Java callable wrapper that can be used to access the specified
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// interface pointer. The VM will keep a reference to this interface pointer.
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// If 'fAssumeThreadSafe' is FALSE, the VM will auto-marshal all COM calls to
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// the current COM context.
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JAVAVMAPI
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HObject *
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__cdecl
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convert_IUnknown_to_Java_Object(
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IUnknown *punk,
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HObject *phJavaClass,
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int fAssumeThreadSafe
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);
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// Returns a Java callable wrapper that can be used to access the specified
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// interface pointer. The VM will keep a reference to this interface pointer.
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// If 'fAssumeThreadSafe' is FALSE, the VM will auto-marshal all COM calls to
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// the current COM context.
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JAVAVMAPI
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HObject *
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__cdecl
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convert_IUnknown_to_Java_Object2(
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IUnknown *punk,
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ClassClass *pClassClass,
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int fFreeThreaded
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);
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// Returns an interface pointer usable from the current COM context.
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JAVAVMAPI
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IUnknown *
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__cdecl
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convert_Java_Object_to_IUnknown(
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HObject *phJavaObject,
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const IID *pIID
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);
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// Returns a data wrapper object of the supplied Class type that points at the
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// supplied data pointer. The memory is not owned by the VM.
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JAVAVMAPI
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HObject *
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__cdecl
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convert_ptr_to_jcdw(
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void *pExtData,
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HObject *phJavaClass
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);
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//----------------------------------------------------------------------------
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// Map HRESULT to ComException.
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//----------------------------------------------------------------------------
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JAVAVMAPI
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void
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__cdecl
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SignalErrorHResult(
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HRESULT theHRESULT
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);
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//----------------------------------------------------------------------------
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// Map Java exception to HRESULT.
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//----------------------------------------------------------------------------
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JAVAVMAPI
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HRESULT
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__cdecl
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HResultFromException(
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HObject *exception_object
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);
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typedef HObject *JAVAARG;
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//----------------------------------------------------------------------------
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// Information structure for Java->COM Custom Method hook.
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//----------------------------------------------------------------------------
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typedef struct {
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DWORD cbSize; // size of structure in bytes
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IUnknown *punk; // pointer to interface being invoked
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const volatile JAVAARG *pJavaArgs; // pointer to Java argument stack
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} J2CMethodHookInfo;
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//----------------------------------------------------------------------------
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// Information structure for COM->Java Custom Method hook.
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//----------------------------------------------------------------------------
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typedef struct {
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DWORD cbSize; // size of structure in bytes
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struct methodblock *javaMethod; // java method to call
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LPVOID pComArgs; // pointer to COM method argument stack
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const volatile JAVAARG *ppThis; // pointer to pointer to Java this
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// Store the COM result here.
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union {
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HRESULT resHR;
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DWORD resDWORD;
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double resDouble;
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};
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} C2JMethodHookInfo;
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JAVAVMAPI
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WORD
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__cdecl
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j2chook_getsizeofuserdata(
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J2CMethodHookInfo *phookinfo
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);
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JAVAVMAPI
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LPVOID
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__cdecl
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j2chook_getuserdata(
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J2CMethodHookInfo *phookinfo
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);
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// Returns the vtable index of the target method.
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JAVAVMAPI
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WORD
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__cdecl
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j2chook_getvtblindex(
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J2CMethodHookInfo *phookinfo
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);
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// Returns the methodblock of the target method.
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JAVAVMAPI
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struct methodblock*
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__cdecl
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j2chook_getmethodblock(
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J2CMethodHookInfo *phookinfo
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);
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JAVAVMAPI
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WORD
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__cdecl
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c2jhook_getsizeofuserdata(
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C2JMethodHookInfo *phookinfo
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);
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JAVAVMAPI
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LPVOID
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__cdecl
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c2jhook_getuserdata(
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C2JMethodHookInfo *phookinfo
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);
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// Returns the class defining the interface method. This is the class
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// containing the MCCustomMethod descriptor.
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JAVAVMAPI
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ClassClass *
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__cdecl
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c2jhook_getexposingclass(
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C2JMethodHookInfo *phookinfo
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);
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//----------------------------------------------------------------------------
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// Thread marshaling helpers
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//
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// The MarshalCall<> APIs will reexecute the RNI method on the supplied thread
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// id or on the apartment thread for the supplied Java object. The APIs will
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// return the following sets of HRESULTS:
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//
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// S_OK The call successfully was marshaled to the target thread.
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// The marshaled call may have generated an exception, which can
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// bechecked by calling exceptionOccurred.
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// S_FALSE The call did not require marshaling to the other thread--
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// the currently executing thread is the target thread.
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// E_<> An error occurred inside the MarshalCall<> API (invalid
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// arguments, out of memory, etc).
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//
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// The typical use of these APIs is to call the appropriate MarshalCall<> API
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// and if the HRESULT is S_FALSE, then execute the rest of the RNI method,
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// otherwise return with the value contained in pResult.
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//----------------------------------------------------------------------------
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typedef void * JAVATID;
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#define JAVATID_MAIN_APARTMENT ((JAVATID) 0x00000001)
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#define JAVATID_SERVER_APARTMENT ((JAVATID) 0x00000002)
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JAVAVMAPI
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HRESULT
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__cdecl
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MarshalCallToJavaThreadId(
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JAVATID tid,
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int64_t *pResult
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);
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JAVAVMAPI
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HRESULT
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__cdecl
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MarshalCallToJavaObjectHostThread(
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HObject *phobj,
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int64_t *pResult
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);
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#ifdef __cplusplus
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}
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#endif
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#endif
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